1. Department of Neurology, Busan Paik Hospital, School of Medicine, Inje University, Busan, Korea.
2. Department of Diagnostic Radiology, Busan Paik Hospital, School of Medicine, Inje University, Busan, Korea.
3. Department of Neurosurgery, Busan Paik Hospital, School of Medicine, Inje University, Busan, Korea.